<template>
  <div class="login-container">
    <!-- 导航栏S -->
    <van-nav-bar class="page-nav-bar" title="登录">
      <van-icon slot="left" name="cross" @click="$router.back()"/>
    </van-nav-bar>
    <!-- /导航栏E -->

    <!-- 登录表单S -->
    <van-form ref="loginForm" @submit="onSubmit">
      <!-- 表单校验 -->
    <van-field
      v-model="user.mobile"
      name="mobile"
      placeholder="请输入手机号"
      :rules="userFormRules.mobile"
      type='number'
      maxlength='11'
    >
    <i slot="left-icon" class="iconfont icon-shouji"></i>
    </van-field>

    <van-field
      v-model="user.code"
      name="code"
      placeholder="验证码"
      :rules="userFormRules.code"
      type='number'
      maxlength='6'
    >
    <i slot="left-icon" class="iconfont icon-yanzhengma"></i>
     <template #button>
       <!-- 倒计时 -->
       <van-count-down
       :time="1000 * 5"
       format="ss s"
       v-if="isCountDownShow"
       @finished="isCountDownShow = false"
       />
      <van-button
      v-else
      round
      class="send-sms-btn"
      size="small"
      type="default"
      native-type="button"
      @click="onSendSms"
      >发送验证码</van-button>
    </template>
    </van-field>
  <div class="login-btn-wrap">
    <van-button class="login-btn" block type="primary" native-type="submit">
      登录
    </van-button>
  </div>
</van-form>
<!-- 登录表单E -->
  </div>
</template>

<script>
import { login, sendSms } from '@/api/user'
export default {
  name: 'LoginIndex',
  components: {},
  props: {},
  data () {
    return {
      user: {
        mobile: '',
        code: ''
      },
      userFormRules: {
        mobile: [{
          required: true,
          message: '手机号不能为空'
        }, {
          pattern: /^1[3|5|7|8]\d{9}$/,
          message: '手机号格式错误'
        }],
        code: [{
          required: true,
          message: '验证码不能为空'
        }, {
          pattern: /^\d{6}$/,
          message: '验证码格式错误'
        }]
      },
      isCountDownShow: false
    }
  },
  computed: {},
  watch: {},
  created () { },
  mounted () { },
  methods: {
    async onSubmit (values) {
      // console.log('submit', values)
      // 获取表单数据
      const user = this.user

      // 表单验证 组件中必须通过this.$toast来调用toast
      this.$toast.loading({
        message: '登录中...',
        forbidClick: true,
        duration: 0
      })

      // 提交表单请求登录
      try {
        const { data } = await login(user)
        this.$store.commit('setUser', data.data)
        this.$toast.success('登录成功')

        // 登录成功跳转回原来页面
        // 不严谨 后面会优化
        this.$router.back()
      } catch (err) {
        if (err.response.status === 400) {
          this.$toast.fail('手机号或验证码错误')
        } else {
          this.$toast.fail('登录失败,请稍后重试')
        }
      }
      // 根据请求响应结果处理后续操作
    },
    async onSendSms () {
      try {
        // 1.校验手机号
        await this.$refs.loginForm.validate('mobile')
        console.log('验证通过')
      } catch (err) {
        return console.log('验证失败', err)
      }

      // 2.验证通过显示倒计时
      this.isCountDownShow = true
      // 3. 请求发送验证码
      try {
        await sendSms(this.user.mobile)
        this.$toast('发送成功')
      } catch (err) {
        // 发送失败 关闭倒计时
        this.isCountDownShow = false
        if (err.response.status === 429) {
          this.$toast('发送太频繁,请稍后重试')
        } else {
          this.$toast('发送失败,请稍后重试')
        }
      }
    }
  }
}
</script>

<style scoped lang="less">
.login-container{
  .iconfont{
    font-size: 37px;
  }

  .send-sms-btn{
  // width: 152px;
  height: 46px;
  line-height: 46px;
  background-color: #ededed;
  font-size: 22px;
  color: #666;
  }

  .login-btn-wrap {
  padding: 53px 33px;
  .login-btn {
     background-color: #6db4fb;
     border: none;
    }
  }
}
</style>
